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Version 1.20 by Xiaoling on 2022/05/12 10:32
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1 = 1. Introduction =
2
3 This article provide the examples for RS485-LN to connect to different type of RS485 sensors.
4
5 == 1.1 Example 1: Connect to Leak relay and VFD ==
6
7 This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to Relay and VFD and communicate with Mobile. The structure is like below:
8
9 [[image:https://wiki.dragino.com/images/thumb/5/5c/RS485_01.png/600px-RS485_01.png||height="297" width="534"]]
10
11 Connection
12
13
14 [[image:https://wiki.dragino.com/images/thumb/f/f2/RS485_02.png/600px-RS485_02.png||height="743" width="528"]](% style="display:none" %)
15
16 Connection
17
18 Related documents:
19
20 * [[Solar Pump with Dragino>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : System Structure
21 * [[Configure Manual>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Relay_VFD/]] : Explanation on how to integrate to Node-red and to the Mobile Phone, and with link to the Github code.
22 * [[Video Demo>>url:https://www.youtube.com/watch?v=TAFZ5eaf-MY&t=6s&ab_channel=XavierFlorensaBerenguer]]
23
24 == 1.2 Example 2: Connect to Pulse Counter ==
25
26 This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to Pulse Counter and communicate with Mobile. This example and example 2 compose the structure for a farm IoT solution. The structure is like below:
27
28 [[image:https://wiki.dragino.com/images/thumb/3/34/RS485_02_1.png/600px-RS485_02_1.png||height="364" width="600"]]
29
30 Connection
31
32
33 [[image:https://wiki.dragino.com/images/thumb/5/5f/RS485_02_2.png/600px-RS485_02_2.png||height="337" width="600"]]
34
35 Connection
36
37 * [[Pickdata MIO40 water pulse counter to LoRa with Dragino RS485-LN>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Pulse-Counter/]] : Configure Document
38 * [[Dragino Solution in Farm>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/&file=Dragino%20on%20Farms.pptx]]
39
40 == 1.3 Example3: Use RS485-LN with energy meters ==
41
42 === 1.3.1 OverView ===
43
44 (((
45 **Note**：The specifications of each energy meter are different, please refer to your own energy meter specifications.
46 )))
47
48 (((
49 This example describes a single-phase meter.This is the connection between the RS485-LN and the energy meter.
50 )))
51
52 [[image:https://wiki.dragino.com/images/thumb/f/f4/Meter1.jpg/600px-Meter1.jpg||height="726" width="545"]]
53
54 Connection1
55
56 (((
57 How to connect with Energy Meter：
58 )))
59
60 (((
61 Follow the instructions of the electric energy meter to connect the phase line and the neutral line, and then connect 485A+ and 485B- to RS485A and RA485B of RS485-LN respectively.
62 )))
63
64 (((
65 The RS485-LN can be powered by 7 ~~ 24V DC power source. Connection as below
66 )))
67
68 (((
69 Power Source VIN to RS485-LN VIN+
70 )))
71
72 (((
73 Power Source GND to RS485-LN VIN-
74 )))
75
76 (((
77 Once there is power, the RS485-LN will be on.
78 )))
79
80 [[image:https://wiki.dragino.com/images/thumb/1/15/Meter2.jpg/600px-Meter2.jpg||height="433" width="577"]]
81
82 Connection2
83
84
85 [[image:https://wiki.dragino.com/images/thumb/a/a5/Meter3.jpg/600px-Meter3.jpg||height="712" width="534"]]
86
87 Connection3
88
89
90 === 1.3.2 How to use the parameters of the energy meter and MODBUS commands ===
91
92 If the user needs to read the parameters of the electric energy meter and use the modbus command,please refer to the appendix of the MODBUS communication protocol in the user manual of the energy meter.
93
94 [[image:https://wiki.dragino.com/images/thumb/3/35/Meter4.png/600px-Meter4.png||alt="Meter4.png" height="193" width="600"]]
95
96 (% class="box infomessage" %)
97 (((
98 Example:AT+COMMAND1=01 03 00 00 00 01 84 0A
99 )))
100
101 * The first byte : slave address code (=001～247)
102 * The second byte : read register value function code
103 * 3rd and 4th bytes: start address of register to be read
104 * 5th and 6th bytes: Number of registers to read
105 * 7th and 8th bytes: CRC16 checksum from bytes 1 to 6.
106
107 (((
108 How to parse the reading of the return command of the parameter：
109 )))
110
111 (% class="box infomessage" %)
112 (((
113 Example:RETURN1：01 03 02 08 FD 7E 05
114 )))
115
116 * The first byte ARD: slave address code (=001～254)
117 * The second byte: Return to read function code
118 * 3rd byte: total number of bytes
119 * 4th～5th bytes: register data
120 * The 6th and 7th bytes: CRC16 checksum
121 * 08 FD is register data. Use short integer 16 bits to convert to decimal, get 2301, then 230.1V is the voltage.
122
123 === 1.3.3 How to configure RS485-LN and parse output commands ===
124
125 RS485-LN provides two configuration methods: AT COMMAND and DOWNLINK.
126
127 ==== 1.3.3.1 via AT COMMAND: ====
128
129 First, we can use **AT+CFGDEV** to get the return value, and we can also judge whether the input parameters are correct.
130
131 (((
132 If the configured parameters and commands are incorrect, the return value is not obtained.
133 )))
134
135 [[image:https://wiki.dragino.com/images/b/bc/AT_COMMAND1.png||height="358" width="456"]]
136
137 AT COMMAND
138
139 (% class="box infomessage" %)
140 (((
141 AT+DATACUTx : This command defines how to handle the return from AT+COMMANDx, max reture length is 40 bytes. AT+DATACUTx=a,b,c
142 )))
143
144 a: length for the return of AT+COMMAND
145
146 b:1: grab valid value by byte, max 6 bytes. 2: grab valid value by bytes section, max 3 sections.
147
148 c: define the position for valid value.
149
150 [[image:https://wiki.dragino.com/images/7/7d/AT_COMMAND2.png||height="278" width="477"]]
151
152 AT COMMAND
153
154 PAYLOAD is available after the valid value is intercepted.
155
156
157 [[image:https://wiki.dragino.com/images/3/3a/AT_COMMAND4.png||height="219" width="576"]]
158
159 AT COMMAND
160
161 You can get configured PAYLOAD on TTN.
162
163
164 [[image:https://wiki.dragino.com/images/thumb/c/c2/AT_COMMAND3.png/600px-AT_COMMAND3.png||height="138" width="600"]]
165
166 (((
167 AT COMMAND
168 )))
169
170 (((
171
172 )))
173
174 (((
175 **Example**: CMD1:Read current data with MODBUS command. address:0x03 AT+COMMAND1= 01 03 00 03 00 01,1
176 )))
177
178 (((
179 RETURN1:01 03 02 00 02 39 85 00 00(return data)
180 )))
181
182 (((
183 AT+DATACUT1:9,1,4+5+6+7 Take the return value 00 02 39 85 as the valid value of reading current data and used to splice payload.
184 )))
185
186 (((
187 CMD2:Read voltage data with MODBUS command. address:0x00 AT+COMMAND2= 01 03 00 00 00 01,1
188 )))
189
190 (((
191 RETURN2:01 03 02 08 DC BE 1D(return data)
192 )))
193
194 (((
195 AT+DATACUT2:7,1,4+5 Take the return value 08 DC as the valid value of reading voltage data and used to splice payload.
196 )))
197
198 (((
199 CMD3:Read total active energy data with MODBUS command. address:0x0031 AT+COMMAND3= 01 03 00 31 00 02,1
200 )))
201
202 (((
203 RETURN3:01 03 04 00 00 00 44 FA 00(return data)
204 )))
205
206 (((
207 AT+DATACUT3:9,1,4+5+6+7 Take the return value 00 00 00 44 as the valid value of reading total active energy data and used to splice payload.
208 )))
209
210 (((
211 Payload:01 00 02 39 85 08 DC 00 00 00 44
212 )))
213
214 [[image:https://wiki.dragino.com/images/thumb/9/9b/AT_COMMAND10.png/600px-AT_COMMAND10.png||height="278" width="600"]]
215
216 AT COMMAND
217
218 01 is device address,00 02 is the current, 08 DC is the voltage,00 00 00 44 is the total active energy.
219
220
221 [[~[~[image:https://wiki.dragino.com/images/thumb/b/b8/AT_COMMAND11.png/600px-AT_COMMAND11.png~|~|height="271" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:AT_COMMAND11.png]]
222
223 AT COMMAND
224
225
226 ==== 1.3.3.2 via LoRaWAN DOWNLINK ====
227
228 [[image:https://wiki.dragino.com/images/thumb/f/fc/DOWNLINK_METER1.png/600px-DOWNLINK_METER1.png||height="423" width="600"]]
229
230 (((
231 DOWNLINK
232 )))
233
234 (((
235
236 )))
237
238 (((
239 Type Code 0xAF
240 )))
241
242 (((
243 0xAF downlink command can be used to set AT+COMMANDx or AT+DATACUTx.
244 )))
245
246 (((
247 Note: if user use AT+COMMANDx to add a new command, he also need to send AT+DATACUTx downlink.
248 )))
249
250 (((
251 Format: AF MM NN LL XX XX XX XX YY
252 )))
253
254 (((
255 Where:
256 )))
257
258 (((
259 MM: the ATCOMMAND or AT+DATACUT to be set. Value from 01 ~~ 0F,
260 )))
261
262 (((
263 NN: 0: no CRC; 1: add CRC-16/MODBUS ; 2: set the AT+DATACUT value.
264 )))
265
266 (((
267 LL: The length of AT+COMMAND or AT+DATACUT command
268 )))
269
270 (((
271 XX XX XX XX: AT+COMMAND or AT+DATACUT command
272 )))
273
274 (((
275 YY: If YY=0, RS485-LN will execute the downlink command without uplink; if YY=1, RS485-LN
276 )))
277
278 (((
279 will execute an uplink after got this command.
280 )))
281
282 (((
283 Example:
284 )))
285
286 (((
287 AF 03 01 06 0A 05 00 04 00 01 00: Same as AT+COMMAND3=0A 05 00 04 00 01,1
288 )))
289
290 [[image:https://wiki.dragino.com/images/thumb/4/45/DOWNLINK_METER2.png/600px-DOWNLINK_METER2.png||height="208" width="600"]]
291
292 DOWNLINK
293
294
295 [[~[~[image:https://wiki.dragino.com/images/thumb/2/20/DOWNLINK_METER3.png/600px-DOWNLINK_METER3.png~|~|height="105" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:DOWNLINK_METER3.png]]
296
297 DOWNLINK
298
299
300 [[image:https://wiki.dragino.com/images/thumb/2/27/DOWNLINK_METER4.png/600px-DOWNLINK_METER4.png||height="210" width="600"]]
301
302 DOWNLINK
303
304
305 [[~[~[image:https://wiki.dragino.com/images/thumb/3/39/DOWNLINK_METER5.png/600px-DOWNLINK_METER5.png~|~|height="176" width="600"~]~]>>url:https://wiki.dragino.com/index.php/File:DOWNLINK_METER5.png]]
306
307 DOWNLINK
308
309
310 [[image:https://wiki.dragino.com/images/thumb/a/a2/DOWNLINK_METER6.png/600px-DOWNLINK_METER6.png||height="365" width="600"]]
311
312 DOWNLINK
313
314
315 === 1.3.4 How to configure and output commands for RS485 to USB ===
316
317 (((
318 This step is not necessary, it is just to show how to use a normal RS485 to USB adapter to connect to the meter to check the input and output. This can be used to test the connection and RS485 command of the meter without RS485-LN.
319 )))
320
321 (((
322 First, connect the A+ and A- of the USB to the 485 A and 485 B of the energy meter.
323 )))
324
325 (((
326 Open the serial port debugging, set the send and receive to HEX.
327 )))
328
329 (((
330 Baud rate: 9600
331 )))
332
333 (((
334 check digit: Even
335 )))
336
337 [[image:https://wiki.dragino.com/images/thumb/8/8f/Usb_meter2.jpg/600px-Usb_meter2.jpg||height="725" width="544"]]
338
339 USB
340
341
342 [[image:https://wiki.dragino.com/images/thumb/6/62/Usb_meter1.jpg/600px-Usb_meter1.jpg||height="728" width="546"]]
343
344 USB
345
346
347 (((
348 The configuration command is consistent with the AT command, input the hexadecimal command directly into the serial port, and the serial port will output the command.
349 )))
350
351 (((
352 **Example:**  input：01 03 00 31 00 02 95 c4
353 )))
354
355 (((
356 output:01 03 04 00 00 00 42 7A 02
357 )))
358
359 [[image:https://wiki.dragino.com/images/thumb/b/b3/Usb_meter3.jpg/600px-Usb_meter3.jpg||height="466" width="600"]]
360
361 USB
362
363 === 1.3.5 How to configure multiple devices and modify device addresses ===
364
365 If users need to read the parameters of multiple energy meters, they need to modify the device address, because the default device address of each energy meter is 01.
366
367 (((
368 (((
369 Set the device address according to the parameters in the appendix of the MODBUS communication protocol.
370 )))
371 )))
372
373 [[image:https://wiki.dragino.com/images/thumb/1/1f/Double_meter3.png/600px-Double_meter3.png||alt="Double meter3.png" height="83" width="600"]]
374
375 **Example**:These two meters are examples of setting parameters and device addresses.
376
377 [[image:https://wiki.dragino.com/images/thumb/e/ee/Double_meter1.jpg/600px-Double_meter1.jpg||alt="Double meter1.jpg" height="737" width="553"]]
378
379 [[image:https://wiki.dragino.com/images/thumb/7/72/Double_meter2.jpg/600px-Double_meter2.jpg||alt="Double meter2.jpg" height="733" width="550"]]
380
381 (((
382 (((
383 First of all, since the default device address of the energy meter is 01, the configuration of two energy meters will conflict, so we first connect an energy meter and configure the device address.
384 )))
385 )))
386
387 (((
388 (((
389 We can use AT+CFGDEV to set the device address.
390 )))
391 )))
392
393 (((
394 (((
395 We modify the device address 01 of the first energy meter to 02.
396 )))
397 )))
398
399 [[image:https://wiki.dragino.com/images/6/6b/Double_meter4.png||alt="Double meter4.png" height="141" width="456"]]
400
401 AT+CFGDEV:01 10 00 61 00 01 02 00 02,1
402
403 * 01:device adaress
404
405 * 10:function code
406
407 * 00 61：Register address
408
409 * 00 01：Number of Registers
410
411 * 02：Number of bytes
412
413 * 00 02：Modified device address
414
415 * 1：Check code
416
417 The device address setting of the energy meter is complete.
418
419 Another energy meter is a single active energy meter with a floating-point format.
420
421 Its default device address is 01, and the following are the parameters for configuring two energy meters.
422
423 [[image:https://wiki.dragino.com/images/1/13/Meter11.png||alt="Meter11.png" height="576" width="379"]]
424
425 [[image:https://wiki.dragino.com/images/thumb/7/7e/Meter12.png/600px-Meter12.png||alt="Meter12.png" height="262" width="600"]]
426
427 PAYLOAD:01 08 DF 43 62
428
429 * 08 DF is the valid value of the meter with device address 02.
430 * 43 62 is the valid value of the meter with device address 01.
431
432 == 1.4 Example 4: Circuit Breaker Remote Open Close ==
433
434 This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to SCHNEIDER SMART and Monitor and control your cabinet remotely with no wires and with Dragino RS485-LN LoRaWAN technology. The structure is like below:
435
436 [[image:https://wiki.dragino.com/images/thumb/f/fa/RS485_04_2.png/600px-RS485_04_2.png||height="336" width="600"]]
437
438 Connection
439
440 * [[Circuit Breaker Remote Open Close>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Circuit_Breaker_Remote_Open_Close/]] : Configure Documen
441
442 == 1.5 Example 5: SEM Three Energy Meter with RS485-BL or RS485-LN ==
443
444 This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-BL to connect to SEM Three Energy Meter and send the data to mobile phone for remote minitor. The structure is like below:
445
446 * [[Connect to SEM Three>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_End_Node/RS485-BL/Application_Note/&file=Dragino%20RS485BL%20and%20pickdata%20SEM%20Three%20v1.pdf]] : Configure Document For RS485-BL
447
448 * [[Connect to SEM Three>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/SEM_Three_Energy_Meter/&file=SEM%20three%20and%20Dragino%20RS485-LN%20v1.pdf]] : Configure Document for RS485-LN
449
450 == 1.6 Example 6:CEM C31 485-T1-MID Energy Meter with RS485-LN ==
451
452 This instruction is provided by Xavier Florensa Berenguer from [[NORIA GRUPO DE COMPRAS>>url:http://www.gruponovelec.com/]]. It is to show how to use RS485-LN to connect to CEM C31 485-T1-MID and send the data for remote minitor. The structure is like below:
453
454 * [[CEM C31 485-T1-MID>>url:http://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/ELECTRICAL%20CABINET/&file=ELECTRICAL%20CABINET%20READINGS.pdf]] : Configure Document For RS485-LN
455
456 == 1.7 Example 7:Schneider Electric PLC M221 with RS485-BL ==
457
458 [[image:https://wiki.dragino.com/images/thumb/9/97/PLC_M221.png/600px-PLC_M221.png||height="353" width="600"]]
459
460 Network Structure
461
462 * [[Reference Instruction>>url:https://www.dragino.com/downloads/index.php?dir=RS485-LN/Application_Note/Schneider%20Electric%20PLC/]]